I just made another discovery. There apparently is not a following error stopper while G76 is running.
Cutting all air, and after slowing the Z accel and maxvel to 75% of what I was using 3 days ago, I found that my Z can make a bit over 21" without any following errors regardless of what jig I dance on the jog keys. That is about a 30% improvement in the rapids that could possibly be expanded to 35 or 40%. Then I loaded up that 4mm x.7mm metric thread cutter routine and reset the spindle from 200 to 700. No problems cutting air. So I crept on up with the spindle override slider until at about 770 revs, the forward cut was the same speed as the retrace, 533 mm according to the display. Knowing Z was tapped out I was expecting a following error, but I went on up to about 1000 rpms, and despite Z being limited by its maxvel, it kept on trucking, which of course would have wrecked the thread in progress. Not that I will ever do that on purpose, so to me it is a shrug, but I thought maybe I should mention it. This would be a special case since X really should be pulled for clearance while the spindle is winding down if the following error were to be asserted, then it might be that the part could be saved. Cheers, Gene -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) My web page: <http://coyoteden.dyndns-free.com:85/gene> Wherever you go...There you are. - Buckaroo Banzai ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
